Michelle Obama Helps Boost J.Crew Stock 64%

As photos surfaced of the First Lady once again wearing an outfit from the preppy line in London this week, a shopping frenzy ensued stateside.

The cream-colored “crystal constellation” cardigan ($298) she wore during a visit to Maggie’s Cancer Caring Centre Wednesday sold out on J.Crew’s Web site by 10 a.m. that morning (her “dazzling dots” skirt, $158, is virtually gone as well).

If you want that sparkly cardi now, get in line: There’s a 200-person waiting list.